8. Testing for Differences in Means and Proportions: Independent Samples t-test
Independent Samples t-test: Test Statistic and p-value
A psychologist wants to examine the effect of mental effort on memory recall. To investigate this matter, two versions of the same text are prepared: one printed in a large and easy-to-read font, and the other in a small and hard-to-read font.
A total of subjects are recruited. Approximately half of the subjects are given the easy-to-read text and the other half are given the hard-to-read text . Both groups are given minutes to study the text, after which they are tested on how well they remember what they have read.
The psychologist plans on using an independent samples -test to determine whether there is a significant difference in the memory performance between the two groups, at the level of significance.
State the null and alternative hypothesis of the proposed test.
A total of subjects are recruited. Approximately half of the subjects are given the easy-to-read text and the other half are given the hard-to-read text . Both groups are given minutes to study the text, after which they are tested on how well they remember what they have read.
The psychologist plans on using an independent samples -test to determine whether there is a significant difference in the memory performance between the two groups, at the level of significance.
State the null and alternative hypothesis of the proposed test.
Unlock full access
